cimo Posted February 23, 2008 Report Share Posted February 23, 2008 .. i am standing with the SparkFun buttons boards here in front of me feeling so stupid.. :-\ .. when i designed them i hadn t got the bicolor leds, later i got them and discovered that they were common anode, no problemo: a little change in the code and they ll be ok but.... in my board the leds share the common pin with the buttons (supposed to be GND) so i can t really have those leds in my boards, and they are already soldered.. :'( :'( :'(it hasn t been so easy to find bicolor, red and blue, leds for a fair price, and impossible to find them common cathode.Does anybody have a source for them? (Jimp where did you get yours?)looking for 5mm leds bicolor (red-blue) common cathode possibly diffused(or maybe can i also invert the buttons behavior?)simone Quote Link to comment Share on other sites More sharing options...
bugfight Posted February 23, 2008 Report Share Posted February 23, 2008 ...Jimp where did you get yours?...(or maybe can i also invert the buttons behavior?)i don't know about jimp, but i got mine at a surplus house near meand they are "normal" red and greeninverting the buttons is not trivial. for one thing, you would have to use pull-down resistors instead of pull-upsie connected from pin to gnd instead of from pin to vddhave you considered using two 3mm leds? Quote Link to comment Share on other sites More sharing options...
cimo Posted February 23, 2008 Author Report Share Posted February 23, 2008 have you considered using two 3mm leds?if i have to make new pcbs i can just route the common anode to a single line aside from the buttons. doh!i think i will cut the traces on the pcb and hardwire the common anodes, so i can use this pcb atmi didn t etch the second board yet so i can redraw it with different signal for common anodes and for common pin of the buttons.. yep i ll do thatsimone Quote Link to comment Share on other sites More sharing options...
bugfight Posted February 23, 2008 Report Share Posted February 23, 2008 that will work too...but i wasn't suggesting a new pcb, you could put the cathode leads together... Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.